Variables: dissolved_oygen total_organic_carbon Keywords: MetFrag monitoring Systems: groundwater Substances: Acetazolamide (BZKPWHYZMXOIDC-UHFFFAOYSA-N) 18-beta-Glycyrrhetinic acid (MPDGHEJMBKOTSU-YKLVYJNSSA-N) 1-(3-Chlorophenyl)-piperazin (VHFVKMTVMIZMIK-UHFFFAOYSA-N)